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ultrasonic vision for blind

by using principles of SONAR
 
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This is based on older idea of ultrasonic stick for blind.

An ultrasonic beam scans horizontally continuously and reflects backs whenever faced with an obstacle. Blind person wears a headphone. If an obstacle is in the middle it gives a beep equally in both speakers of headphone. If obstacle is on the right only right speaker beeps. Same for left. Similarly if obstacle is 20 % left of the middle then proportionately strength of beep is more in left speaker and less in right.

Thus by using stereophonic beeps, one can get an idea of position of an obstacle relative to center line.

Similarly strength of beep can give an idea of vertical position of the obstacle.

VJW, Dec 14 2010

(?) LMGTFY http://lmgtfy.com/?...ision+for+the+blind
This never gets old, does it? [DIYMatt, Dec 14 2010]

[link]






       You did google 'ultrasonic vision blind' did you not?
MaxwellBuchanan, Dec 14 2010
  

       do you have link ?
VJW, Dec 14 2010
  

       Just put the words ultrasonic, vision and blind into Google. There's plenty.
MaxwellBuchanan, Dec 14 2010
  

       I, er, found a link.
DIYMatt, Dec 14 2010
  

       WAY cool [DIYMatt!!] I haven't seen that!! Thanks for letting me see somthing new!!
xandram, Dec 14 2010
  
      
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